query.graphql

query {
  repository(owner: "aereal", name: "delay-time-calc") {
    ref(qualifiedName: "refs/heads/master") {
      target {
        ... on Commit {
          tree {
            entries {
              name
              object {
                ... on Tree {
                  entries {
                    name
                    object {
                      ... on Blob{
                        text
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}